Answer: D. The Ku Klux Klan
Explanation:
In 1915,the year Leo Frank (a Jew) was executed for his potential involvement in the murder of a 12 year old girl, Mary Phagan, William J. Simmons was credited with restarting the KKK. According to him though, his target was not just black people but anyone he considered not to be white, American or Protestant as he deemed them unworthy of life in the USA.